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1. 发明授权

US5858589A Intensity modulated stochastic screening for preparing a lithographic printing plate 失效
标题翻译：强度调制随机筛选制备平版印刷版
公开(公告)号：US5858589A
公开(公告)日：1999-01-12
申请号：US618679
申请日：1996-03-20
申请人： Rene Govaert , Paul Delabastita , Jacobus Bosschaerts
发明人： Rene Govaert , Paul Delabastita , Jacobus Bosschaerts
IPC分类号： B41C1/00 , B41C1/10 , B41N1/02 , G03F5/00 , G03F7/07 , H04N1/405 , G03F7/20
CPC分类号： G03F7/07 , B41C1/1083 , H04N1/4051
摘要： A method for making a lithographic printing plate from an original containing multiple tones comprising the steps of frequency modulation screening the multiple image to obtain screened data representing tones of the multiple tone image in terms of halftone dots; reproducing the halftone dots on a lithographic printing plate precursor having a surface capable of being differentiated in ink accepting and ink repellant areas upon scanwise exposure and an optional development step, by means of a scanwise exposure, wherein the scanwise exposure for rendering a halftone dot is intensity modulated.
摘要翻译：一种从包含多个色调的原稿制作平版印刷版的方法，包括以下步骤：对所述多个图像进行频率调制筛选以获得表示所述多色调图像的色调的筛选数据; 通过扫描曝光在平版印刷版原版上再现半色调点，该平版印刷版原版具有在扫描曝光和可选显影步骤时具有能够在接受油墨和拒墨区域中区分的表面的平版印刷版，其中用于渲染半色调点的扫描曝光是强度调制。

2. 发明授权

US5700610A Time modulated stochastic screening 失效
标题翻译：时间调制随机筛选
公开(公告)号：US5700610A
公开(公告)日：1997-12-23
申请号：US618681
申请日：1996-03-20
申请人： Jacobus Bosschaerts , Rene Govaert , Paul Delabastita
发明人： Jacobus Bosschaerts , Rene Govaert , Paul Delabastita
IPC分类号： B41C1/00 , B41N1/02 , G03F5/00 , G03F7/07 , H04N1/405 , G03C5/08 , G03F7/20
CPC分类号： G03F7/07 , H04N1/4051
摘要： A method for generating a screened reproduction of a multiple tone image comprising the steps of frequency modulation screening the multiple tone image to obtain screened data representing tones of the multiple tone image in terms of halftone dots, reproducing the halftone dots on an imaging element by means of a scanwise exposure, characterized in that the scanwise exposure for rendering a halftone dot is time modulated.
摘要翻译：一种用于产生多色调图像的屏蔽再现的方法，包括以下步骤：对所述多色调图像进行频率调制筛选，以获得表示所述多色调图像的色调的屏幕数据，以半色调点为基准，通过装置再现成像元件上的半色调点的扫描曝光，其特征在于用于渲染半色调点的扫描曝光被时间调制。

3. 发明授权

US5677093A Size modulated stochastic screening 失效
标题翻译：大小调制随机筛选
公开(公告)号：US5677093A
公开(公告)日：1997-10-14
申请号：US618680
申请日：1996-03-20
申请人： Paul Delabastita , Jacobus Bosschaerts , Rene Govaert
发明人： Paul Delabastita , Jacobus Bosschaerts , Rene Govaert
IPC分类号： B41C1/00 , B41C1/10 , B41N1/02 , G03F5/00 , G03F7/07 , H04N1/405 , G03F7/20
CPC分类号： B41C1/1083 , G03F7/07 , H04N1/4051
摘要： A method for generating a screened reproduction of a multiple tone image comprises the steps of frequency modulation or stochastic screening the multiple image to obtain screened data representing tones of the multiple tone image in terms of halftone dots; reproducing the halftone dots on an imaging element by means of a scanwise exposure, wherein the size or composition of the halftone dot is modulated, by varying the number of microdots (or rels) composing a halftone dot.
摘要翻译：用于产生多色调图像的屏蔽再现的方法包括频率调制或随机筛选多个图像以获得表示以色调点为基础的多色调图像的色调的屏幕数据的步骤; 通过扫描曝光在成像元件上再现半色调点，其中通过改变构成半色调点的微点数（或相关度）来调制半色调点的大小或组成。

4. 发明授权

US5745120A High fidelity color rendering method avoiding moire problems 失效
标题翻译：高保真的彩色渲染方法，避免了莫尔条纹问题
公开(公告)号：US5745120A
公开(公告)日：1998-04-28
申请号：US646712
申请日：1996-05-06
申请人： Dirk De Baer , Rene Govaert
发明人： Dirk De Baer , Rene Govaert
IPC分类号： B41M1/14 , G03F3/08 , G03F5/00 , G03F5/22 , H04N1/54
CPC分类号： H04N1/54
摘要： In order to achieve a larger color gamut, more colorants are used than the classical three chromatic colors cyan, magenta and yellow. The use of extra process colors, such as red or orange, green and blue, poses extra requirements on the screening process or on the color separation process. A method is described in which optimal color rendering is achieved by use of maximum three chromatic colorants at the same place only. In one embodiment particular sets of three chromatic colorants each cover color sub-gamuts which are disjunctive, allowing each input color to be located within one color sub-gamut. A set comprises no complementary colors.
摘要翻译：为了实现更大的色域，使用比古典三色彩色青色，品红色和黄色更多的着色剂。使用额外的工艺颜色，如红色或橙色，绿色和蓝色，对筛选过程或颜色分离过程提出了额外的要求。描述了一种方法，其中通过仅在相同的地方使用最大三个彩色着色剂来实现最佳的显色。在一个实施方案中，三组彩色着色剂的特定组各自覆盖分离的颜色子色域，允许每个输入颜色位于一个颜色子色域内。一套不含补色。

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